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Plant transducers of the endoplasmic reticulum unfolded protein response

机译:内质网的植物转化子展开的蛋白质反应

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摘要

The unfolded protein response (UPR) activates a set of genes to overcome accumulation of unfolded proteins in the endoplasmic reticulum (ER), a condition termed ER stress, and constitutes an essential part of ER protein quality control that ensures efficient maturation of secretory and membrane proteins in eukaryotes. Recent studies on Arabidopsis and rice identified the signaling pathway in which the ER membrane-localized ribonuclease IRE1 (inositol-requiring enzyme 1) catalyzes unconventional cytoplasmic splicing of mRNA, thereby producing the active transcription factor Arabidopsis bZIP60 (basic leucine zipper 60) and its ortholog in rice. Here we review recent findings identifying the molecular components of the plant UPR, including IRE1/bZIP60 and the membrane-bound transcription factors bZIP17 and bZIP28, and implicating its importance in several physiological phenomena such as pathogen response.
机译:未折叠的蛋白质应答(UPR)激活一组基因以克服未折叠的蛋白质在内质网(ER)中的积累,这种情况称为ER应激,并且构成ER蛋白质质量控​​制的重要组成部分,可确保分泌物和膜的有效成熟真核生物中的蛋白质。最近对拟南芥和水稻的研究确定了信号传导途径,其中ER膜定位的核糖核酸酶IRE1(肌醇需要酶1)催化mRNA的非常规胞质剪接,从而产生活性转录因子拟南芥bZIP60(碱性亮氨酸拉链60)及其直系同源物在米饭中。在这里,我们回顾了最近的发现,这些发现确定了植物UPR的分子成分,包括IRE1 / bZIP60和膜结合转录因子bZIP17和bZIP28,并暗示了它在诸如病原体反应等几种生理现象中的重要性。

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